Genome-wide mapping of HATs and HDACs reveals distinct functions in active and inactive genes.

Genome-wide mapping of HATs and HDACs reveals distinct functions in active and inactive genes.
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DOI:
10.1016/j.cell.2009.06.049
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发表时间:
2009-09-04
期刊:
影响因子:
64.5
通讯作者:
Zhao K
Zhao K
中科院分区:
生物学1区
文献类型:
--
作者:
Wang Z;Zang C;Cui K;Schones DE;Barski A;Peng W;Zhao K

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组蛋白乙酰转移酶(HATs)和组蛋白去乙酰化酶(hdac)具有拮抗作用,控制对许多细胞过程至关重要的组蛋白乙酰化状态。我们在此描述了全基因组定位实验,揭示了染色质上的hat (CBP、p300、PCAF、Tip60、MOF)和HDACs (HDAC1、HDAC2、HDAC3、HDAC6)与基因表达和组蛋白乙酰化呈正相关。我们提供的证据表明,Tip60和HDAC6是通过磷酸化的RNA Pol II靶向活性基因的转录区域。我们的研究结果表明mll介导的H3K4甲基化启动染色质以促进组蛋白乙酰化。我们的数据表明,人类基因组中的大多数hdac通过去除活性基因中的乙酰化来重置染色质;瞬时HAT/HDAC结合的乙酰化和去乙酰化的动态循环阻止Pol II与H3K4甲基化引发的基因结合,并为它们的未来激活做好准备。
Histone acetyltransferases (HATs) and histone deacetylases (HDACs) function antagonistically to control histone acetylation states that are crucial to many cellular processes. We describe here genome-wide mapping experiments that reveal that both HATs (CBP, p300, PCAF, Tip60, MOF) and HDACs (HDAC1, HDAC2, HDAC3, HDAC6) on chromatin are positively correlated with gene expression and histone acetylation. We provide evidence that Tip60 and HDAC6 are targeted to transcribed regions of active genes by phosphorylated RNA Pol II. Our results indicate that MLL-mediated H3K4 methylation primes chromatin to facilitate histone acetylation. Our data suggest that the majority of HDACs in the human genome function to reset chromatin by removing acetylation in active genes; the dynamic cycle of acetylation and deacetylation by transient HAT/HDAC binding prevents Pol II from binding to the genes primed by H3K4 methylation and poises them for future activation.
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